Strap and tightening key



Feb. 26, 1935. J. PROSKY STRAP AND. TIGHTENING KEY Filed March 51 1953 2 Sheets-Sheet 1 Jase A TTORNEYS.

Feb. 26, 1935. J, P 1,992,505

STRAP AND 'I'IGHTENING KEY Filed March 31, 1933 2 Sheets-Sheet 2 LEI-3' ATTORNEY J0 seph Pro 519'" v Patented set. 2c, 1935 v 1,992,505

UNITED STATES PATENT OFFICE 1,992,505 STRAP AND TIGHTENING KEY Joseph Proslw, Bronx, N. Y.

Application March 31, 1933, Serial No. 863,756

13 Claims. (Cl. 245-19) This invention relates to a. strap and 'tightenonto the pipe, the strap S is extended around the ing key. hose H and is tightened in a constricting posi- Such straps are used, wherever a band is placed tion by the key K.

around an object to retain it by the application The key K may be attached to one end of the t. of centripetal force. Such straps find a promistrap S or may iorinpart thereof. In the draw- 5 nent use in connection with hose clamps, where ings one end of the strap is attenuated for that such a strap is placed around and constricts a purpose and the tongue which forms the end of hose extended over a pipe thus providing a fluidsaid attenuation is struck up and bent back tight connection. The instant exemplary deforming a hook 11. This hook is engaged upon scripticn of this invention will be carried through the base 12 of the key K, extending through a 1c in connection with such a hose clamp. suitable opening 13 therein.

One object of this invention is to provide a key The sides 14 of the base 12 are struck up and which maybe attached to any length of band or tongues 15 extend from said struck up Portions strap and may serve to constr'ict said strap to 14 through suitable slots'in the cover 16'and are 15 any size of loop desired. folded over thereonto so that the base 12 and 15 I Another object of. this invention is to provide the cover 16 form a housing. a perforated strap and a key, the perforations of The front and rear ends 1'1 and 18 of the cover said strap providing not onlypoints of attach- 16 are struck down and are semi-circularly rement for said key but also gripping facilities in cessed at the center of their bottomedges. The

- tightening up on the constricting loop. slots 19 thus provided in said ends accommodate 20 A further object of this invention is to provide in bearing fashion'a thumb screw 20. The said a positive lock for a perforated strap after it has h m Screw h a spiral' ad f the p l been tightened by a worm or screw engaged upon called a worm thread, such thread being orperforations in said strap.- dinarily used on worms which in the art of gear- These and other objects of this invention will s en a e upon worm w eels or spur ears. 25 be more clearly understood from the following Th h h ho i ,ie. underneath the description and accompanying drawings in struck-down ends 17 and 18 of the cover 16 and which: 1 on top of the base 12, extends the free end 21 Fig. 1 i a. perspective view showing a ho of the strap S resting on top of the base 12, as

strap tightened by my strap and key onto a pipe. Shown in the l w Th nd 21 of h trap -30 Fig. 2 shows a corresponding detailedvcross- S i P v Wi Slanted Slots which are section taken along the axis of the key. Spaced and angularly disp d in conformity Wit Fig. 3 illustrates a modification of my inventhe pitch of the worm thread of thumb screw 20. tion in another perspective View. The slots 19 in the ends 17 and 18 journal the Fig. 4 shows a corresponding detail ero thumb screw at such a distance above the base 35 section. i 12, that the thread of said thumb screw meshes Fig. 5 illustrates a simplified modification of upon the teeth provided upon the end of strap 21 the device of Figs. 1 and 2 in a detailed side view, by virtue of and between slots 22. A clearance limited to a showing of the overlapping ends of cut 23 is longitudinally provided in the base 12,

40 the strap and of the key. so that the thread of the screw 20 may extend 40 Fig.8 shows a corresponding end view taken i downwardly through the toothed end 21 of the the direction indicated by the numeral 6 and an Strap, n m y v x nd into the hose H which arrow in connection with Fig. 5. is ordinarily made of flexible material like rubber Fig. 7 shows a bottom view corresponding t or rubberized fabric, so that the worm is fricthe view of Fig. 5. tionally engaged upon said hose H as shown at 38. 45

Fig. 8 illustrates another modification in a h the Screw Cannot dily be jarred loose, detailed view which is partly executed as an end after the strap h n i h n d up thereby. view partlyas a cross-section. But after the strap has been tightened up by Fig. 9 shows in a perspective view a, modifi athe screw 20, it may also be retained fixedly in tion of my invention. p r the tightened position if one of the. slots 22 in 50 Similar numerals refer to similar parts the end 21 of said strap 8 is hooked over the throughout the various views: lip or hook 24, which has been struck up from The hose H is sectioned flush with the end of the base 12 in order to form the opening 13 I the pipe P over which it extends and to which thereinit is to be attached. In order to clamp the nose It is understood that the slots 22,-or grooves 55 for the purpose of providing teeth therein in which a worm 20 may mesh,--may be provided upon strap S to whatever extent thereof is to be engaged by the key K. It may be perforated along its whole length, in which case a tongue may be struck down from the base 12 in.f'order to engage the strap S through one of the openings 22, instead of the arrangement of Fig. 1, in which tongue 11 is struck up from the end of the straps, and engages base 12 through opening 13. Such converse is readily understood and practiced by those acquainted with this art. A strap of sufiicient length may therefore be used for the purpose of clamping any diameter hose. onto a suitable pipe, or may be used in any other instance where an adjustable strap is required.

This is illustrated in Fig. 9 where'two pieces of rubber hose H1 and H: are connected by a pair of modified devices of my invention by way of a pipe P. The strap and key on hose H1 are centrally cross-sectioned, and the'strap S is engaged by a tongue 42 struck down from the base 12 at a point where removed from the left end of strap S, so that the strap S is engaged by the struckup lip or hook 24, close to its right end, e. g., through the second to the last hole 22. But the struck down tongue 42 may also be engaged upon strap S near its left end, in which case a strap of the same length as the one cross-sectioned on top of hose H1 would extend way to the right as shown in connectionwith the strap S on hose H2.

In the views of Figs. 3 and 4 the strap S, which clamps hose H ontopipe P is shown tobe provided with slots 22 at both of its ends, 25 and 26, which are engaged upon a key L." The key L again comprises a thumb screw 27 and a housing 28. The housing 28 is bent up from one piece of fiat sheet material (similar to that of the housing 12) and comprises a base part 29, curved sides 30 bent back onto said base, and top strips 31 which form a platform; an opening centrally provided between strips 31- in said platform rotatably accommodates the stem 33 of said thumb screw 27. a

The housing 28 is provided with suitable clearance cuts 34 near the edges at which the sides 30 are bent back on the base 29 and with narrow slots at the platform through which the ends 25 and 26 of the strap Sextends into and out from the housing 28, respectively. The worm screw 2'7 may be provided with a conical lug 35 above the stem 33, which serves tospread the ends 25 and 26 of the slot S apart after they have been extended through the-housing 28'. Clearance cuts 36 may be provided in the sides 30 of the housing, in order to allow free play for the threaded part 37 of the thumb screw 2'7.

It is readily understood that in the case of both modifications shown the ends 21 or the ends'25 and 26 of the strap may be extended through the housing and threaded into mesh engagement with the thumb screws, saidscrews pulling the straps through the housings as they are turned in clockwise direction. The end thrust of the thumb screw is taken up in one instance by the struck-down end 18 of the cover 16, in the other instance by the base 29 of the housing.

The manner in which acontinuously perforated strap may be adapted to afford a firm but adjustable mounting for the key in any desired position, and will also provide a firm hold for tightening the screw, is illustrated in the modifications of Figs. 5, 6 and 7.

The key K is here shown to provide a socket into which the thumb screw 20 may be inserted at will, as long as the ends of the strap have not been inserted therethrough. But when the two ends 21 and 39 of the strap S are inserted tin the key, the key retains the screw 20 in mesh withthe end 21 of strap S, inside of the key, serving as a journal rotatably supporting the threaded part of thumb screw 20.

The end 21 of the strap S is,when in operative position,-slidably supported by the other end 39 of the strap which rests on the bottom horizontal flaps 40 extending from the key towards each other as integral parts thereof. From the flaps 40 the teeth 41 are struck up at a distance apart from each other which corresponds with the pitch of either the perforations provided for engagement by screw 20 in the strap S or perforations provided for this particular purpose'.

Whereas the end 39 supports the end 21 in a position of mesh with the thumb screw 20, the reverse is also true, i. e., the teeth 41 retain the end 39 in a fixed position on the key as long as the screw 20 and the end 21 are in an operative position. n

'A strap of the kind shown may of course be readily cut to a desired length and then one end 39 thereof is inserted into the key K. Then the other end 21 of the strap is pushed through the key, and into the part of the said end which emerges to the right of the key, the thumb screw 20 may be meshedly inserted. When the end 21 of strap S is then pulled back to the left, the screw 20 is pulled into its socket in key K, whereupon all the parts are in an operative position. In other words by now rotating the thumb screw 20 in a clockwise direction, the strap may be tightened up so that its loop constricts whatever it is extended over.

In Fig. 6 the back wall of the key is shown to be beaded at 42 below the point where it offers a thrustwise support for the thumb screw 20. This bead confronts the slot through which the two ends of the strap are extended so that the insertion of the end 21 is facilitated.

Of course a comparatively heavy and strong material should be used for the strap, to prevent deformation thereof by a tightening up of the hand screw 20. But when it is not desirable to resort to the use of a material for the strap of such strength as to prevent a slight deformation, the two ends of the strap should not be slidably disposed on top of each other because a deformed end 21 of the strap may' wardly the teeth 41 which are bent back in' opposite directions at their lower ends so that they engage upon the perforations or threads provided in the end 39 ofstrap S. If in this instance rsilient material is used for the sides of key K, the key K may be removed from the end 39 of the strap by compressing said sides whereby the teeth 41 are disengaged from the end 39. Of course this is only possible as long as the end 21 of the strap and the worm 20 are not in position in the key. After those parts are .properly positioned in the key they serve to space said sides apart and thus prevent disengagement of the end 39 from the teeth 41.

Although I have shown and described one form of embodiment of my invention in detail, yet I do not wish to be limited thereby, except as the state of the art and the appended claims may require, for it is obvious that various modifications and changes may be made in the form of embodiment of my invention, without departing from the spirit and scope thereof.

What I claim is:-

1. In a hose clamp, a. perforated strap, a key detachably engaged upon perforations of said strap, and a screw comprised and thrustwise supported in said key and meshing upon the perforations of the looped-back free end of said strap.

gaged upon the perforations of said key, a screw comprised in said key, a strap extending through said key, meshedly engaged by said screw, and locked on said key by said hook, when said hook is extended through one of the perforations of said strap.

'3. In a hose clamp, a key, a. screw comprised and socketed in said key ,and a perforated strap extending through said key, one end. of said strap meshing said screw, and the other end of said strap being detachably retained on said key.

4. In a hose clamp, a key, a screw comprised and socketed insaid key, and a perforated strap extending through said key, one end of said strap meshing said screw, and the other end of said strap being detachably and adjustably retained on said key.

5. In a hose clamp, a key, a screw comprised and socketed in said key, a perforated strap extending through said key, one end of said strap meshing said screw, and teeth on said key enthe other end of said strap.

6. In a hose clamp in combination with a perforated strap, and a key comprising a screw and a toothed covering, said covering retaining one end of said strap in mesh with said screw and the other end thereof in mesh with its teeth, when said ends and screw are accommodated in said covering.

'7. Ina hose clamp, a key, teeth on said'key,

a screw socketed in said key, and a strap perforated in order to provide a thread therein, the ends of said strap being meshedly en ed by said screw and said teeth, respectively, when strap perforated in order to provide a thread thereon, the ends' of said strap being meshedly I engaged by said, screw and said teeth, respectively, when they are overlappingly engaged by said key.

9. In a hose clamp, a key, teeth extending up from said key, a screw socketed in said key, and a strap perforated in order to provide a thread thereon, the ends of said strap being meshedly engaged by said screw and said teeth, respectively, when they are overlappingly engaged by said key.

10. In a hose clamp, a key, a screw socketed in said key, and a strap perforated in order to provide a thread thereon, the ends of said strap being meshedly engaged by said screw and vertically guided in said key, when they are'overlappingly engaged by said key.

11. In a hose clamp, a key, a .screw socketed in said key, and a strap perforated in order to provide a .thread thereon, the ends of said strap being meshedly engaged by said screw and extending down in said key and then horizontally in opposite directions when they are over-' lappingly engaged by said key, said key being resilient and said screw being disengageable from the second of said ends when said key is collapsed, but locked in said second end when the first of said ends is engaged by said screws in said key. 12. In a hose clamp, a key comprising a tightening screw, and a strap with a toothed surface,

said surface being meshedly engaged by oppo-' site sides of said screw, when the ends of said strap are operatively extended into said key.

13. In a hose clamp, a key comprising a tight- I ening screw, a toothed strap, and means on said key guiding the ends of said strap past opposite sides of said screw in meshed engagement with said screw.

JOSEPH PROSKY. 

